How to prevent bacterial sepsis in freshwater fish

This disease is an fulminant infectious disease. The main pathogens are Aeromonas, Yersinia and other pathogens, and there are new pathogens. The epidemic season is generally April-October, and the epidemic peak period is June-August. It is the largest number of damaging species of freshwater fish in the history of fish farming in China, with the largest age range of endangered fish, the widest epidemic area, and the longest epidemic season. The most serious type of acute infectious disease. The following methods are used for prevention and treatment and have a good effect.

Prevention methods (1) Thoroughly clean fishponds. One is the batch removal of silt in stages. Too much organic matter deposits and too deep silt are a very important factor in the outbreak of bacterial sepsis. The second is the disinfection of quicklime. (2) Do a good job of fingerling disinfection. When stocking fingerlings in adult ponds, each cubic metre of water shall be disinfected with 1 g of bleaching powder in the whole pool. (3) The stocking density and mix proportion should be reasonable. In particular, stocking densities should be based on water quality conditions and should not be too dense. (4) Regular drug prevention. The whole pool is splashed with lime once a month. For every 0.067 hectare of water, 1 meter with 15-20 kg. On the second day of splashing lime, internal medicines for bacterial sepsis were fed for several days.

Treatment methods (1) On the first day, Quanchipa was splashed with lime 1 time, and the depth of 1 meter of water per 0.067 hectare of pond was 15 to 20 kg of lime for improving the water quality. He served as a blood supply agent from the 2nd to the 4th day. The daily dose of 100 kilograms of fish is 25 grams. First mix the drug with the same amount of flour, then evenly mix in the fine rice bran, soak it in water for about 2 hours, dry it and then knead it into a powder. The dosage of 1 day is divided into two sprinkling and feeding. 3 days and 1 course of treatment. (2) In the case of concurrent bacterial rot disease, bleaching powder shall be sprayed on the first day of the whole pool, and 1 g of medicine or trichloroisocyanuric acid per cubic meter of water shall be administered (0.4 g/m3 of water). The second day to the fourth day of feeding sepsis, usage and dosage are the same as above.

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